www.militaar.net

The difficulty is even greater when it comes to the theft (or “exfiltration”, as it is known) of data. For China and Russia, ransacking Western firms for high-tech research and other intellectual property is tempting. The other way round offers thinner pickings. In 2009 hackers from an unnamed “foreign intelligence agency” made off with some 24,000 confidential files from Lockheed Martin, a big American defence contractor. As a result they could eavesdrop on online meetings and technical discussions, and gather information about the sensors, computer systems and “stealth” technology of the F-35 Joint Strike Fighter. This may have added to the delays of an already troubled programme as engineers tried to fix vulnerabilities that had been exposed in the plane’s design. Investigators traced the penetrations with a “high level of certainty” to known Chinese IP addresses and digital fingerprints that had been used for attacks in the past. Less than two years later, China unveiled its first stealth fighter, the J-20.

The program announced an intention to change performance specifications for the F-35A, reducing turn performance from 5.3 to 4.6 sustained Gs and extending the time for acceleration from 0.8 Mach to 1.2 Mach by 8 seconds

The program announced an intention to change performance specifications for the F-35C, reducing turn performance from 5.1 to 5.0 sustained Gs and increasing the time for acceleration from 0.8 Mach to 1.2 Mach by at least 43 seconds. These changes were due to the results of air vehicle performance and flying qualities evaluations

Aircraft availability rates for the F-35A varied from less than 5 percent to close to 60 percent in a given week from the first flights in March through October, with an average availability of less than 35 percent, meaning three of nine aircraft were available on average at any given time

One test in this series, LF-19D-27, demonstrated aircraft vulnerabilities to fires associated with leaks from the PAO system. The aircraft uses flammable PAO in the avionics coolant system, which has a large footprint on the F-35. The threat in this ballistic test ruptured the PAO pressure line in the area just below the cockpit, causing a sustained PAO‑based fire with a leak rate of 2.2 gallons per minute (gpm).

-- The program assessed that a similar event in flight would likely cause an immediate incapacitation and loss of the pilot and aircraft. The test article, like the production design, lacks a PAO shutoff system to mitigate this vulnerability.

The first test series confirmed Polyalphaolefin (PAO) coolant and fueldraulic systems fire vulnerabilities. The relevant protective systems were removed from the aircraft in 2008 as part of a weight reduction effort. A Computation of Vulnerable Area Tool analysis shows that the removal of these systems results in a 25 percent increase in aircraft vulnerability

Lennuki eri mudelite sustained turn rate'i vaadates kipuvad nad rohkem pommitaja klassi minema. Ju siis USA on nii kindel, et tagab üleoleku õhus teiste masinatega. Lisaks tundub, et tuleohutussüsteemid, mis korjati liigse kaalu tõttu ära 2008, teevad lennuki üsna ebaturvaliseks (ja sellega taheti kunagi A-10 asendama hakata )

The Netherlands will buy 37 JSF jets which will keep the cost within the €4.5bn special budget set aside for the purpose. They will cost an additional €270m a year to keep in the air, the Telegraaf reports, quoting sources in The Hague.
[...]
The JSF will gradually replace the aging F-16 fleet between 2019 and 2023.